| Title: |
Role of mycorrhizal inoculation in the modulation of the wheat leaf transcriptome and the induction of partial resistance against Zymoseptoria tritici ; Rôle de l’inoculation mycorhizienne dans la modulation du transcriptome foliaire du blé et l’induction d’une résistance contre Zymoseptoria tritici |
| Authors: |
Delaeter, Mathieu |
| Contributors: |
Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV); Université du Littoral Côte d'Opale (ULCO); Université du Littoral Côte d'Opale; Anissa Lounès-Hadj Sahraoui; Maryline Magnin-Robert |
| Source: |
https://theses.hal.science/tel-05480444 ; Sciences agricoles. Université du Littoral Côte d'Opale, 2025. Français. ⟨NNT : 2025DUNK0749⟩. |
| Publisher Information: |
CCSD |
| Publication Year: |
2025 |
| Subject Terms: |
Rhizosphere and root microbiota; Mycorrhiza-Induced resistance; Transcriptomic; Septoria tritici blotch; Mycorrhization; Wheat; Microbiote rhizosphérique et racinaire; Transcriptomique; Septoriose; Mycorhization; Blé; [SDV.SA]Life Sciences [q-bio]/Agricultural sciences; [SDV.BIO]Life Sciences [q-bio]/Biotechnology |
| Description: |
This thesis project takes place in the context of the transition from conventional agriculture to more sustainable practices, which requires the development of new farming methods that are more respectful of human health and the environment. The reduction in the use of chemical inputs is accompanied by the development of biosolutions, some of which involve the use of beneficial microorganisms, such as arbuscular mycorrhizal fungi (AMF), to improve plant growth and health. These AMF have shown the ability to induce resistance in plants against certain fungal pathogens, known as Mycorrhizal-Induced Resistance (MIR). Thus, this research aims to evaluate the ability of the AMF Funneliformis mosseae to protect wheat against Septoria tritici blotch (STB), a major foliar disease in wheat caused by the hemibiotrophic fungus Zymoseptoria tritici. This thesis work revolves around three main objectives : (i) to analyze the transcriptomic modifications induced by F.mosseae at the foliar tissues during the establishment of mycorrhizal symbiosis in the roots ; (ii) to understand the foliar molecular mechanisms involved in the protection of bread wheat against STB, induced by F.mosseae ; and (iii) to characterize the microbial communities associated with the roots and rhizosphere of three plant species, including wheat, cultivated on soil from organic wheat fields in the Hauts-de-France region. The analysis of the co-occurrence networks of these microbial communities will help design microbial inocula enriched with AMF, better adapted to local pedoclimatic conditions. Our results showed that, alongside the increase in root colonization by F.mosseae, a systemic response was observed in wheat leaves as early as the 19th day of cultivation, with a marked activation of numerous leaf gene expressionsstarting from the 42nd day of co-culture. Although plant biomass was not affected by root mycorrhization, several metabolic pathways were simulated, including proteolysis, carbon metabolism, photorespiration (accompanied by stoamatal ... |
| Document Type: |
doctoral or postdoctoral thesis |
| Language: |
French |
| Relation: |
NNT: 2025DUNK0749 |
| Availability: |
https://theses.hal.science/tel-05480444; https://theses.hal.science/tel-05480444v1/document; https://theses.hal.science/tel-05480444v1/file/135584_DELAETER_2025_archivage.pdf |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.7054F109 |
| Database: |
BASE |